Wireline

Wireline The function of the network is to share its resources and to communicate electronically. • A network typically consists of two or more computers that are relate. • Computer Network works with the use of wireline cables as liaison between computers. • The cable used is a coaxial cable, twisted pair, and fiber optics. • On each computer must be equipped with interface card called with NIC (Network Interface Card) or LAN (Local Area Network) • Network cable is typically used on small areas, for example in a room and the building. • Every computer connected to the network has a MAC address or IP address (Internet Protocol) different.

Wireline Networks of Excellence • Data transmission 10 s.d. 100 Mbps, • Delay or a connection between computers quickly, • Data transmission running smoothly • Cost of affordable equipment Weakness wireline networks • The use is limited to one affordable place wires, • Time for the old installation • Requires the place and location of permanent network • Requires regular maintenance costs • It is difficult to migrate Network Wireless (Wireless) • Along with the sophistication of information technology, to build a computer network can be made possible without the use of cable (wireless). • To replace the connecting cable can be used as a wave radio (Radio Frequency), infrared light (infrared), Bluetooth, and via microwave (microwave). • mobile computer, such as notebooks and Personal Digital Assistant (PDA) is a computer that can be used on a wireless network.

The advantages and benefits of wireless networks: • Mobility Wireless -Network provide real-time access to network users anywhere while in the access limits. • Speed of Installation The process in the network installation is relatively faster and easier because it does not require cables to be installed as a liaison. • Flexibility place Wireless network or wireless is very flexible on where, in contrast to the cable network is not possible to be installed without wires. • Reduction Budget -When A transfer occurs, the budget can be reduced even though the initial investment in a wireless network is more costly than wired networks. Installation costs can be reduced because it does not require wiring and maintenance costs were cheaper. • Ability to Reach -Configure Network can be changed from a peer-to-peer for a small number of users into the network infrastructure more. In fact, can reach thousands of users that can roam with a wide range. Weakness Wireless Networks • Data transmission is only 1-2 Mbps which is much lower amount when compared to the wired network. • Transmission of data from different computers can interfere with each other. • The cost of expensive equipment. • There is a time delay or a great connection • The radio propagation problems, such as blocked, reflected, and many sources of interference. • Network capacity limitations caused by spectrum not great (frequency band can not be extended). • Data security or confidentiality of data is less reliable. • The signal is discontinuous (intermittence) caused by the presence of objects blocking the signal

Network with Modem • The modem is an electronic medium to connect computers to the Internet network. • The modem works using digital signal translates into an analog signal to be transmitted and vice versa, translating analog signals into digital signals. Based on the technology, the modem can be distinguished: • Dial-up Modem (Modem Phone) • Cable Modem • DSL Modem Dial-up Modem • Working with using a wireline network is wired telephone. • To be able to subscribe to the Internet with a dial-up models can contact your ISP (Internet Service Provider). • type dial-up modem on the market consists of an internal modem and an external modem. • The internal modem is installed on the mainboard expansion slots while the external model is mounted on a computer using a serial data cable or data cable USB. • In Indonesia, some ISPs provide services to the Internet with a dial-up modem including Telkomnet, Indosatnet, Wasantaranet, and CBNnet. • To date, the dial-up internet access. Network with Modem • The modem is an electronic medium to connect computers to the Internet network. • The modem works using digital signal translates into an analog signal to be transmitted and vice versa, translating analog signals into digital signals. Based on the technology, the modem can be distinguished: • Dial-up Modem (Modem Phone) • Cable Modem • DSL Modem Dial-up Modem Cable Modem • Cable Modem has a way of working that resembles how the Network Interface Card (NIC) or ethernet card that is installed on a computer to a Local Area Network (LAN). • The difference between how the modem with ethernet is the distance problem. Modem is not influenced by the distance despite only having a speed of 50 Kbps (kilobits per second), while the ethernet which has a speed of 10 or 100 Mbps (megabits per second) can only be within a maximum distance of approximately 1 km. Cable modem speeds ranging from 3-56 Mbps, and can work within a distance of 100 miles more. • The work process is separate from the cable modem from the cable TV signal into two signals to television and data signals are connected to the cable modem. Both signals it will not interfere with each other. Then the cable modem is connected to the network card (Network Interface Card) contained in the PC (Personal Computer). Downstream data rates (incoming signal) average ranges between 4-56 Mbps. • To be able to connect the Internet, cable television service providers to connect itself to the Internet backbone service providers greater, namely the connection OC-3 (155 Mbps) or multiple redundant OC-3. Multiple redundant OC-3 can handle the bandwidth requirements of many customers. • To be able to connect the Internet, cable television service providers to connect itself to the Internet backbone service providers greater, namely the connection OC-3 (155 Mbps) or multiple redundant OC-3. Multiple redundant OC-3 can handle the bandwidth requirements of many customers.

• Currently, DSL (Digital Subscriber Line) is The main competitor of cable modems. • In terms of speed and cost is no different away with the cable modem. • Technology for a new DSL modem available is ADSL (Asymmetric Digital Subscribber Line). • In Indonesia, not all the areas covered by DSL technology. • ADSL telephone cable network that has been upgraded or have specific enhancement. ADSL does not require a second phone line but need a splitter to the division between the modem to the phone. • ADSL speed is not too much different from the cable modem, where the downstream speed (data entry) a maximum of 1.5 Mbps and upstream speeds (data out) ranged from 64 Kbps. ADSL technology will develop a modem with a speed of 52 Mbps, approximately 50 times better than the current one.

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Excess Media Satellite

Excess Media Satellite, namely: 1. Connection anywhere. No need to LOS (Line of sigth) and there is no problem with distance, 2. Reach broad scope of national, regional and global, 3. The relatively rapid infrastructure development for large areas, compared to terrestrial, 4. Communication can be done either point to point or from one point to many points in broadcasting, multicassting, 5. Bitrate high and wide bandwidth access, 6. VSAT can be installed anywhere for entry in satellite range, 7. Reliable and can be used to connect voice, video and data, by providing a wide bandwidth, 8. If the access network to the Internet directly to the ISP / NAP router with reliability approaching 100%, 9. Very good for sparse population density areas and does not have any telecommunications infrastructure. Satellite Media deficiency, namely: 1. The amount of throughput will be limited due to the propagation delay of a geostationary satellite. Now a variety of techniques already developed link protocol that can overcome these problems. Including the use of Forward Error Correction which ensures a small probability of retransmition, 2. Time required from one point on Earth to another point through the satellite is about 700 milliseconds (latency), while leased lines only takes about 40 milliseconds. This is caused by the distance that must be taken by the data that is from the earth to the satellite and back to earth. Geostationary Satellite own altitude of about 36,000 kilometers above the Earth's surface. 3. Highly sensitive weather and high rainfall, higher frequency signals are used, the higher attenuation due to rainfall. 4. Prone lightning strike.

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The development of information

The development of information and communication technologies in line with the progress of time requires increased knowledge and skills in using the technology tools. For that, we need to study and understand the technology well in order to provide more knowledge and information up to date. In the face of the development of information and communication technology, we are required to learn at an early age so that we can contribute optimally. This material is intended can provide most of the material for you to have enough stock to understand the use of information and communication technology equipment, and understand the future prospects. With this material also expected you have a horizon of thought and knowledge in general and in particular that today many are needed in everyday life. Until the current information technology is growing very rapidly along with the discovery and development of science in the field of information and communication. It is able to create tools that support the development of information technology, ranging from communication systems through a direct communication tool as well as a two-way (interactive). Basically, information technology equipment includes three main tools: A. Computer systems; B. Network Communication Systems; C. Net Tools. A. Computer Systems Computer is an electronic device that is capable of receiving, processing, and storing the data, and generates output in the form of text, images, symbols, numbers and sounds. In operation, the form, the system and its function, the computer consists of two (2) parts: hardware and software. 1. Hardware To meet the demand for the kinds of information, people always to develop the hardware to support it. To accommodate this interest, he creates a variety of tools that support these desires. Computer hardware devices can be grouped into an input device (Keyboard, Scanner), the process (including: CPU), output and storage devices (such as: monitors, and printers), and a data storage device (such as: CD-ROM, Compact Disc, floppy disk, Hard disk). Details on computer you will earn well Keyboard is a tool to enter data or commands to the CPU (Central Processing Unit). The keyboard usually consists of a series of letters and numbers. Scanner is a tool to enter data such as image / graphics and turn it into a digital form that can be processed and combined with the form data in the form of text. Central Processing Units (CPU) is tool that serves as a processor (processor) data. CPU is a series circuit that stores instruction-processing instructions, and temporary data storage. Monitor is a tool that can display text or image of the data processed in the CPU. The printer is a tool to produce a data output (output) print the form, either in the form of text and pictures / graphics. CD Rom is an additional tool (instrument peripherals) that is capable of storing and write data and programs through media Compact Disk (CD). This tool is designed to be able to write and read data or program through Optical system. Compact Disk (CD) is a storage medium made of plastic material. The process of storing and reading data using an optical system. Software is a computer program that contains a set of instructions that is made using a special language. This Program, gave orders to the computer to perform various operations / processing of the data contained in the program or the data entered by the user computer. In short the software is a 'soul' while the hardware to function as a 'body' in a computer. In general, the software can be classified into two (2) classes of system software and application software. Discussion specifically about the software you will get on another occasion. B. Network Communication Systems Communication network is a system that is able to connect and combine multiple points of communication into a single entity that is capable of interacting with one another. Telephone is a two-way communication tool that allows two or more people to talk without being limited distance. Integrated Services Digital Network (ISDN) is a specialized communication network that uses the telephone network meproses not only sound, but also able to handle data storage in the form of text, images, video, fax, and others. Facsimile is a tool that is able to send documents in exactly the same over the telephone network. Fiber optic is a communication network that is capable of transmitting data in high frequency. In this network communication paths do not use copper wire but uses light as a conductor of the data. Leased lines are fixed telephone network (permanent) that connects two or more sites. This network does not have the tools switcher (switching) or the like, this network working between places that are specifically linked or predetermined. This network is also known as private line. Wirekess is Wireless communication network. Communications network that uses radio waves / specific frequency that serves as a conductor of information. This communication network using a transmitter, amplifier, and the wave receiver that contains the data. Wireless communication network that uses satellite that serves as a transmitter, receiver and amplifier. The communication system using wave as a conductor of data The antenna is a device used to transmit and receive radio communications. TV and Radio is a means of delivering information (mass media) that uses sound waves as a conductor signals and images. Mobile communication is communication that uses radio transmission to transmit signal information, the tool is better known by the name of mobile phones. C. Net tools Various ways humans use to facilitate and maintain the quality of the connection through the internet. Since then, the tools that support the ability to network (net tools) is growing rapidly. Network system that was only used by a limited circle now very familiar even to the household level. 1) Server A computer that works as a data provider, the provider of software and data storage is server. Even a server capable of regulating the flow of information in a network that regulates. 2) Client Client is a personal computer (PC) in a communication network that has the ability to process the data and is able to ask for information to the server. 3) Router A router is a device used in a network that is able to transmit data to other networks through more quickly, accurately and efficiently. 4) Modem Modulator / Demodullator is a tool that allows PC, Mini Computer, or mainframe to receive and send data in digital form through the channel telephone.

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